Mumbai, Aug. 21 -- Indian benchmark indices ended the week on a volatile note on Friday as elevated global bond yields, high crude oil prices and geopolitical concerns continued to weigh on investor sentiment.

The Nifty 50 gained 20.15 points, or 0.08 per cent, to close at 24,252, while the BSE Sensex ended at 77,540.83, gaining 3.11 points, or 0.00 per cent.

Vinod Nair, Head of Research, Geojit Investments, said elevated global bond yields continued to remain a concern for the market.

"The elevated global bond yields continue to cause worry in the market. The recent US Treasury's move to ease the bond yields failed to provide lasting comfort, given surging crude prices and persistent inflation fears," Nair said.

He said India's 10-ye...